#define  _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
void swap(int *a, int *b)
{
	int c;
	c = *a;*a = *b;
	*b = c;
	

}
int main()
{
	int a=2, b=5;
	swap(&a, &b);
	printf("%d,%d", a,b);
	return 0;
}